Silencer for telephones



Feb. 6, 1923. 1,444,494. S. T. COHANE.

SILENCER FOR TELEPHONES.

FILED FEB.15,1922.

.ephones Patented Feb. 6, 1923.

SYLVESTER T. COHANE, 0F HARTFORD, CONNECTICUT.

SILENCER FOR TELEPHONES.

Application filed February 15, 1922. Serial No. 536,790.

To all whom t may camera.'

Be it known that SYLvEs'rER T. COHANE, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, has invented certain new and useful Improvements in Silencers for Telephones, of which the following is a specification.

This invention relates to a silencer for tel- Among the objects of the invention are the provision of an article of. this character which can be inexpensively and easily made, readily applied and by the employment of which the user of a telephone can conduct a conversation thereover without likelihood of being heard by those in his vicinitv.

In the drawing accompanying and forming part of the present specification I have shown in detail one of the several forms of embodiment of the invention which to enable those skilled in the art to practice the same will be set forth fully in the following description. Clearly I am in no way restricted to this disclosure. I may depart therefrom in several respects within the sco e of the invention defined by the claims folihwing said description.

Referring to said drawing Figure 1 is a side elevation of a telephone instrument furnished with al silencer involving the invention and showing a way of using it.

Fig. 2 is a cross section on the line 2--2- 4of Fig. 1 looking in the direction of the arrow.

Fig. 3 is a sectional view of the silencer showing it applied to the mouth piece of the telephone.

Like characters refer to like parts throughout the several views.

In Fig. 1 I have shown the familiar telephone which is denoted in a general Way by 2 being provided with the transmitter 3 having the customary mouth piece 4. The receiver and its hook are not shown because they do not concern the invention. At the present time in using the mouth piece 4 it is practically impossible, except when in a booth, to transmit speech without those near hearing and my primary motive as will be inferred, is to accomplish this thing without likelihood of those near the user .hearing what -is transmitted.

The silencer is denoted in a general way by 5 and it has means by which it can be detachably connected with the mouth piece 4. It is usually made of some iiexible material such as rubber, and comprises a body as 6 which is virtually of circular formation. Said vbody 6 comprises an inner wall 7, an outer wall 8 and a side wall as 9 which as will be understood, is desirably annular or circular, although I am not restricted in this regard. The inner wall has practically centrally thereof the opening 10 surrounded externally by the outwardly flared nipple 11 having near its free edge the rabbet 12 which removably fits over and receives the outer edge portion of the telephone mouth piece 4. In other words the silencer is practically connected with the telephone mouth piece in an air tight manner.

As shown the inner wall 7 has internally thereof the two annular flanges 13 which receive between them the single flange 14 of the outer wall so as to provide within the body 6 a tortuous silencing-passage.

The outer wall 8 as shown has apractically central opening 15 which is surrounded, within the body 6 by an annular ange 16, the depth of which equals that of t-he flange 14 and aids with them in securing the tortuous passage to which I have referred.

The body 6 is provided with an outwardlyflared mouth-piece 17 which virtually constitutes a continuation of the flange or tube 16 and which is intended to receive the mouth of the user. 4

I have found in practice that by putting the mouth into this mouth-piece 17 speech can be transmitted without likelihood of being heard close to the instrument, the mouth piece`being sufficiently enlarged to receive the human mouth.

The silencing effect I ind can be augmented by providing the wall 7y with one or more perforations as '18.

What I claim is 1. A telephone silencer comprising a body involving inner and outer approximately parallel circular walls arid a cylindrical wall connected with the peripheral portions of t-he inner and the outer walls to provide a hollow structure, a plurality of staggered annular walls inside the body, spaced from each other and connected respectively rigidly with the inner and the outer circular. walls to provide a tortuous passage, the inner wall of the body having means for detachable connection witlra telephone mouth'- piece` the outer wall havlng a mouthpiece to receive the mouth of a user. l

2. A telephone silencer comprising a bodyinvolving lnnerand outer upproxinnattely 'parallel circular Walls, and a( c lindrical Wall` connected with the peripher portions of the inner and the outer Walls to provide a 1hollow structure, a plurality of sta, gered from with the 'inner and the outer clrculaatr ner' Wali of the\body havingmens vfor de-l tachable connection with a. telephone mouthof thev body having a tube surrounded by and spaced from the inner annular wall an constituting a continuation of the mouthpiece'.

"15 piece, the outer Wall having amouthpiecev to receive the -mouth of a user, thevouter Wall In testimony whereof I aiix my signature.

"SYLVESTER T. ooHANn In presence efr- MARY F. LONG, y I-IxiA'ri` SUTHERLANn.' 

